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' 4 <br /> 0 <br /> • Mr. Gabriel Karam -3- is 18 October 1993 <br /> The County must do the following: <br /> 1. Verify that the foundation layer for the primary and secondary landfills meets the required <br /> standard for relative compaction of 90%. <br /> 2. Remove SP/SM material so that appropriate depth of liner material can be placed for final <br /> cover. The entire test pad should be removed so that the final cap can be constructed in a <br /> continuous manner. <br /> 3. Provide a copy of the compaction curves. The compaction curves were not submitted with <br /> the report. <br /> 4. Submit documentation which demonstrates that there is enough ML material available onsite <br /> to construct the final cover. If the County determines that there is not enough ML material, <br /> the County must provide an alternate material. This material must be tested and any <br /> associated costs must be reflected in a revised closure plan. <br /> 5. Construct another test pad using the same methods and materials that the County will use in <br /> the final cap or conduct field permeability tests on the final cap after it is completed. A <br /> vegetative layer may be placed on the final cap while it is being tested, but may have to be <br /> removed if the cap fails and the clay barrier layer has to be reworked to meet construction <br /> requirements. <br /> If you have any questions, please contact me at (916) 255-3136. <br /> ROBERT A. ANS <br /> Project Engineer <br /> RAE <br /> cc: W s Mindermann, California Integrated Waste management Board, Sacramento <br /> VEd Padilla, San Joaquin County Public Health Services, Stockton <br /> Ron Heinzen, Kleinfelder, Inc., Stockton <br />